The middle
of the twenty-fifth century. The Dalek war is drawing to an untidy close.
Earth's Office of External Operation is trying to extend its influence over the
corporations that have controlled human-occupied space since man first ventured
to the stars.

Agent Isabelle Defries is leading one expedition. Among her
barely-controllable squad is an explosives expert who calls herself Ace. Their
destination: Arcadia.

A non-technological paradise? A living laboratory
for a centuries-long experiment? Fuel for a super-being? Even when Ace and
Benny discover the truth, The Doctor refuses to listen to them.